XML 35 R47.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Inventory (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 4,093 $ 4,961
Work in process 0 490
Finished goods 1,230 759
Total inventories $ 5,323 $ 6,210
Finished goods shelf life 36 months